Researchers have recently found a way to measure blood pressure via graphene e-tattoos on the skin.

Would one be Halachically allowed to get such a tattoo, or would this fall under the category of כתבת קעקע (Kedoshim 19:28)? Would even healthy people be allowed to get such a tattoo?

  • medicalhalacha.org/2021/08/24/are-those-eyebrows-real and this article in Tradition Halakhic Issues Presented by Breast Cancer discusses medical tattoing as part of Chemo jstor.org/stable/23263919 but this article says that in Israel they don't tattoo jewishexponent.com/2013/06/13/…
    – rosends
    Commented Jun 27, 2022 at 18:34
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    Is a "graphene e-tattoo" actually a tattoo (ink/dye/pigment placed into an incision)? Or is it an implant that is colloquially being referred to as a "tattoo"? From what I can tell no incision is made nor ink used, rather the devise is adhesed to the surface of the skin. Commented Jun 27, 2022 at 23:09
  • @Deuteronomy is right. 2. the prohibition is on the doer IIRC (Rambam), so if a gentile does it it's his problem :)
    – Al Berko
    Commented Jun 28, 2022 at 7:41
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    @AlBerko אבל זה שכתבו בבשרו וקיעקעו בו--אינו חייב אלא אם סייע, כדי שיעשה מעשה; אבל אם לא עשה כלום, אינו לוקה. Assisting in the act also determines liability (H. AZ 12:11[15]). Paying and willfully positioning/submitting the body are forms of assistance. Commented Jun 28, 2022 at 13:37
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    now.northropgrumman.com/… this is a "tattoo" in colloquial name only. There is no incision or ink, and it only stays on for a short time. There is no relation to the issurim involved in tattoos.
    – Esther
    Commented Jun 28, 2022 at 18:00


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